1. The names of those websites don't sound remotely serious. "Earn1Bitcoin" unless you're 12 WTF do you suppose happens on a site like that unless Santa is running it?

2. Endless recruiting and mentions of residual or passive income are always problematic when reviewing any opportunity. Somebody has to sell stuff to an end user not involved in the scheme. If its not the person making the video or the person watching the video a red flag large enough to get you stomped by the bull being peddled is waving in your face.

3. Plays on hot trends like Bitcoin and displacing social media giants with a you too can get paid message are favorites in the scam world.

4. Videos with liberal use of the word scam. If someone baits you into a video telling you something isn't a scam, its a scam.

Re: High probability owner is stealing funds and manipulating blockchain

While I grok the other claims and accusations, I do not understand how one would manipulate a mining blockchain.
Would you care to elaborate and explain this to someone who doesn't deal with the cryptocurrency world?

Re: High probability owner is stealing funds and manipulating blockchain

After taking a quick look at btcgds.com and their public documentation, I can conclusively say that this scheme is criminal and misleading. What they describe is nothing more than a bitcoin version of a cash gifting pyramid scheme, falsely calling the transfers donations rather than recognizing that they are an unregistered and illegal security.